package com.cjy.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Utils {
    public static String code(String str){
        try {
            MessageDigest md5 = MessageDigest.getInstance("MD5");
            md5.update(str.getBytes());
            byte[] digest = md5.digest();
            int i;
            StringBuffer buf = new StringBuffer("");
            for (int offfset = 0; offfset < digest.length; offfset++) {
                i = digest[offfset];
                if (i<0){
                    i+=256;
                }
                if (i<16){
                    buf.append("0");
                }
                buf.append(Integer.toHexString(i));
            }
            // 32位加密
            return buf.toString();
            // 16位加密
            //return buf.toString().substring(8,24);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) {
        System.out.println(code("123456"));
    }
}
